Struct futures_util::future::Shared

#[must_use = "futures do nothing unless you `.await` or poll them"]
pub struct Shared<Fut: Future> { /* fields omitted */ }

Future for the shared method.

Implementations

impl<Fut> Shared<Fut> where
    Fut: Future,
    Fut::Output: Clone, 

pub fn peek(&self) -> Option<&Fut::Output>

Returns Some containing a reference to this Shared’s output if it has already been computed by a clone or None if it hasn’t been computed yet or this Shared already returned its output from poll.

pub fn downgrade(&self) -> Option<WeakShared<Fut>>

Creates a new WeakShared for this Shared.

Returns None if it has already been polled to completion.

Trait Implementations

impl<Fut> Clone for Shared<Fut> where
    Fut: Future, 

fn clone(&self) -> Self

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Fut: Future> Debug for Shared<Fut>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Fut> Drop for Shared<Fut> where
    Fut: Future, 

fn drop(&mut self)

Executes the destructor for this type.

impl<Fut> FusedFuture for Shared<Fut> where
    Fut: Future,
    Fut::Output: Clone, 

fn is_terminated(&self) -> bool

Returns true if the underlying future should no longer be polled.

impl<Fut> Future for Shared<Fut> where
    Fut: Future,
    Fut::Output: Clone, 

type Output = Fut::Output

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.

impl<Fut: Future> Unpin for Shared<Fut>